Meanwhile, you can use other programs like YouTube-DL, yt-dlp, youtube-dl-gui, XDM, IDM, FireDM (formerly PyIDM). The page's disappearance does seem like a serious issue, and it remains unclear whether FDM will add support for YouTube downloads again. Here's a Web Archive version of it from April 2021. The YouTube page on FDM's site has also been pulled, and gives a 404. I mentioned earlier that the developer had to 'turn off the option for YouTube', this is likely the intermediary service that was taken down. The other theory is that Free Download Manager relies on an external service for YouTube downloads, probably to parse the video links (fetch the metadata, URLs, resolution, etc.) and sends it to the program for download. It seems unlikely, since I was able to download the videos using other programs. One, something has changed on YouTube's end, which is causing the error. So why were older versions displaying the error? Clearly this error isn't specific to the version being used, so it has to be server related problems. I was manually copying the YouTube video's URL and pasting it in the program. Though I had the FDM extension installed in the browser, I wasn't using it to grab the media. So, I went all the way back to version 5, and it still gave me an error, but this time it said 'Parsing failure.